National Polls: Obama and Clinton Tied in N.H. and Iowa; Giuliani Plummets in S.C.

Since July, once-frontrunner Rudy Giuliani has plummeted from 30 to 16 percent in South Carolina–Mike Huckabee now leads with 24 percent. Among Democrats, Clinton’s lead narrows. [CNN/Opinion Research]

African Americans in South Carolina are now evenly split between Clinton and Obama. [CNN/Opinion Research]

Clinton and Obama are tied at 27 percent in Iowa. John Edwards is in third place with 22 percent. [Diageo/Hotline]